Charging hub



FIG. 1 is a front perspective view of a charging hub showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in FIGS. 1 through 7 illustrate portions of the charging hub which form no part of the claimed design. 

CLAIM The ornamental design for a charging hub, as shown and described. 